Combination roller chock and mooring bitts



Feb. 21, 1950 J. MLCZOFFIN 2,495,394

COMBINATION ROLLER cuocx AND MOORING BITTS Filed April 27, 1943 2' Sheets-Sheet 1 a La My /7 Corr/Ar J. M. COFFIN 2,498,394

Feb. 21, 1950 COMBINATION ROLLER CHOCK AND MOORING BITTS 2 Sheets-Sheet 2 Filed April 27, 1948 fPc-zfi 1 Z z i 72 A;

6 v /z 1 Z 56.4 /4 5 8 :J 5 /5 F W 2/ //VVEN7'OR Bah Jay/v MGOFH/Y am ma rim iffy? Patented Feb. 21, 1950 OFFICE COlHBINATION ROLLER CHOCK AND MOORING BITTS John M. Coffin, Silver Spring, Md.

Application April 27, 1948, Serial No. 23,594

7 Claims.

The present invention relates generally to boat chocks and lashings, and more specifically to an improved combination roller chock and mooring bitts, which while adapted for various purposes and uses, is especially designed for installation, preferably, at the bow or stem of a small boat to facilitate handling of a cable or rope and for convenience in fastening or binding the cable or rope in desired position.

The primary object of the invention is the provision of an appliance, or attachment, of this character that is simple in construction and operation, which consists of a minimum number of standardized parts that may with facility be manufactured with low cost of production, and the parts may be assembled and installed with convenience, to insure a durable and reliable appliance for efficient performance of its functions.

The invention resides essentially in novel combinations and arrangements of a head and an axle mounted therein on which a chock roller or sheave is journaled and retained in operative position by means of a pair of opposed bitts, as will be hereinafter described, and more particularly set forth in the appended claims.

In the accompanying drawings I have illustrated complete examples and several modifications of physical embodiments of the invention in which the parts are combined and arranged in accord with satisfactory modes I have devised for the practical application of the invention. It will however be understood that changes and alterations are contemplated and may be made in these exemplifying drawings and mechanical structures, within the scope of my claims, without departing from the principles of the invention.

Figure 1 is a view in front elevation showing the stem head of a boat equipped with the combination chock roller and bitts of my invention.

Figure 2 is a similar View of a modified arrangement of the appliance and employing hard wood bitts.

Figure 3 is a horizontal longitudinal sectional view through the structure of Fig. 1; and Figure 4 is a horizontal sectional view through the appliance of Fig. 2.

Figure 5 is a view in front elevation of an all metal appliance or attachment for the stem of a boat; and Figure 6 is a side view of the structure of Fig. 5, parts being broken away for convenience of illustration.

For a clear understanding of the relation and utility of parts I have shown in Figs. 1 and 2 a 2 portion of a boat as B including a bifurcated stem head of wood that includes spaced uprights I and 2 provided with axially alined bores 3 and 4 both of which are counterbored to form exterior sockets 5.

A metallic chockroller or sheave 6 of suitable type is mounted between the uprights of the bifurcated head on an axle 7, and they hub 8 of the sheave or roller is journaled 0n the axle as indicated in Fig. 3. Both ends of the axle, shaft, or spindle l, are threaded and these threaded ends project laterally from the outer sides of the bifurcated stem head, suitable washers, as 9, being mounted on the axle between the hub 8 and the adjoining faces of the bifurcated head.

The axle is retained in place by means of two oppositely arranged tubular bitts Ill and II, of brass, iron, or other suitable metal, and these bitts are internally threaded for screw engagement with the threaded ends of the axle.

The inner ends of the bitts are seated in the sockets 5, 5, of the bifurcated head, and each bitt is provided with an annular clamping flange l2 for engagement with the outer face of the bifurcated head. The tubular bitts may be threaded and clamped on the axle-ends by any suitable means, as for instance, by inserting a turning pin in a transverse hole I3 in the closed outer end of the bitt, whereby the bitts may be solidly clamped against the stem head and utilized for lashing a rope .or cable in usual manner.

In the form of the invention shown in Figs. 2 and 4, hard wood bitts I4 and [5, of larger diameter are shown with their inner ends seated in the sockets 5, 5, of the stem head and annular flanges [2, I2, clamped against the exterior faces of the head. The tubular bitts I4 and [5 are mounted on the projecting ends of a tubular axle I6, on which the sheave 6 is journaled, and the ends of the tubular axle are internally threaded to receive a pair of screw bolts l1, each having a head 18 located within the counterbore IQ of the tubular bitts, and metallic washers 9 are interposed between the bolt heads and the wood bodies of the tubular bitts.

In Figs. 5 and 6 the invention is embodied in an all metal attachment that may be fastened to a suitable supporting portion, as the bow, of a boat, and in this attachment the metallic, bifurcated, stem head includes a pair of spaced uprights 20, 20 that are equipped with integral attaching flanges or plates 2| and 22, angularly disposed to fit the prow of a boat, and the flanges are drilled with holes 23 to accommodate the fastening screws 24.

The all metal attachment includes the sheave 6 having a journal bearing as indicated in Fig. 3, andthe bitts I0 and I I are utilized to clamp the assembly on the bifurcated stem head.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent isz' 1. In an appliance as described, the combination with a bifurcated head, an axle mounted in the head with projecting ends, and a sheave journaled on the axle Within the bifurcated head, of a pair of tubular bitts mounted on the projecting ends, and means for fastening the bitts on said ends.

2. In a boat appliance including a bifurcated stem-head, the combination with an axle mounted in the stem-head, and a chock roller journalled on the axle, of a pair of tubular bitts mounted 1;

sunk sockets, an axle having threaded ends and extended through said bores and sockets, and a chock-roller journaled on the axle, of a pair of tubular bitts seated in said sockets and threaded on said ends of the axle.

5. In a boat appliance, the combination with a bifurcated stem head having axially alined bores, an axle having threaded ends extended through said bores, and a chock roller journaled on the axle, of a pair of tubular bitts threaded on said ends against the stem head, and tightening means on the bitts for engagement by a turning tool.

6. In a boat appliance, the combination with a bifurcated stem head having axially alined bores, a tubular axle having internally threaded ends and extended through said bores, and a chock roller journaled on the tubular axle, of a pair of tubular bitts mounted on the ends of the axle against the stem head, a bolt mounted in each bitt and threaded in an axle-end, and a retaining head on each bolt enclosed within a counterbore of a bitt.

7. In a boat appliance, the combination with a bifurcated head having axially alined bores and a pair of angular attaching flanges, an axle mounted in the head with its ends projecting therefrom, and a chock roller journaled on the axle, of a pair of tubular bitts, and co-acting means on the bitts and axle-ends for clamping the bitts against the bifurcated head.

JOHN M. COFFIN' No references cited. 

